Measuring system



E. ROUCKA IEASURING SYSTEM Filed July 17. 1922 Aug. 9 9

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Patented Aug. 9, 1927.

ERICK E0116, 0] BLANSKO, CZEGHOSLOVAKIA.

MEASURING SYSTEM.

Application filed, July 17, 1922, Serial No. 525,755, and m dzechoslovakia Augult 30, 1821.

ing application Serial No. 575,753, filed July 17, 1922, for measuring any physical or chemical quantity, qualit value or condition, such as flow of flllld, fluid pressure, composition of fluids, temperature, electrical quantities, etc., by means of auxiliary me-v 1 having a flow resisting device 2 therein.

chanical energy.

The system comprises in general means actuated by or sensitive to the value to'be measured, means mechanically cooperating with said first-mentioned means for compensating or balancing the same, a governor for controlling said second-mentioned means,

- and means responsive to departures from 'means for actuating said governor.

balance between said first two-mentioaold T e value being measured may act in the said sensitive means as a mechanical force, or as the variable position of a movable member, and a mechanical force produced by a spring. weight, centrifugally, etc., or the position of a movable member actuated by auxiliary power cooperates with said first-mentioned force orposition of the movable member in said sensitive means to compensate or balance the same. The measure is the position of the movable member producedby the auxiliary energy.

q The balancing condition or force may be continuously or uninterruptedly produced to cooperate with the said means actuated by the value to balance the same, or said balancing force may be caused to cooperate periodically or at intervals with said second-mentioned means, for example, for periods of ten, twenty, thirty seconds,- etc., during which periods the measuring takes place.

The objects of the invention are to provide in such a system means for producing slight motion or vibrations of the relatively movable slidably cooperating parts to reduce friction therebetween and increase accuracy and sensitivity; to provide in such a system the combination with a motor actuated by auxiliary power for producing the balancing condition, of a governor for said motor and a relay motor to actuate said governor; to provide means between the means sensitive to the valueand the balancing condition for producing a special and definite relation between the variations in value and the movement of the movable member; to provide in a system of this character a fluid motor for actuating the measuring movable member;

and to obtain other results and advantages as nay be brought out by the following descriptlon.

In the accompanying drawing the figure 1s a diagrammatic illustration of a system embodying my invention.

The value to be measured is shown as the flow of a fluid flowing through a conduit Pipes 3 are connected to the conduit 1 at opposite sides of the flow resistance device 2 and 'to a diaphragm chamber 4 at opposite sides of a diaphragm 5. The said, diaphragm is thus actuated by or sensitive to variations or differences in pressure of the fluid on opposite sides of the flow resistance device 2. t

-The diaphragm is provided with a rod 6 having a pin and slotconnection with one arm of a bell crank lever 15 pivotally mounted to a fixed support 16 and pivotally connected at its other end to one end of a link 17, the opposite end of which is pivotally connected to oneend of a link- 18, the other end of whichjis pivotally connected to the piston rod of a PlStOIl 24 mounted in a cylinder 23 of a relay governor and motor there-' for. The relay governor controls the flow of auxiliary fluid to and from a fluid motor comprising the cylinder 13 and piston 12 through pipes 25. The action of the relay motor is controlled by agovernor valve comprising a valve iston 20 mounted in a cvlinder 2,1, thepiston rod 19 of said valve piston being connected to the link 18'so as to be actuated by movements of the diaphragm 5.

' The piston rod 11 of'the piston 12 of the I fluid motor carries a cam block 10 which engages a roller 8 mounted in a carriage slidable in a fixed support .9 within the dia phra gm chamber 4, the carriage of said roller S'being connected to one end ofa sprin 7, the opposite end of which is connected to the side of the diaphragm 5 opposite the rod .6. The force of the spring 7 cooperates with balance in the system, such as differences in.

' pressure on opposite sides of theflow resistance device 2. the diaphra '5 is actuated in one direction or the ot er and in turn swings thebell crank lever (which is thus responsive to such departuresfrom hal- Y to the roller 8 so as to vary the tension of ance) so asto move the link18'aboutits pivotal connection with the rod of the piston 24, thereby moving the governor valve piston 20 in one direct1on to admit fluid to one of the chambers 123 or 124 of the relay motor from a supply pipe 200, and from the other of said chambers. The piston 24 1s thus moved in one direction and admits fluid from a Suppl ipe 230 to one side of the iston 12 am? 5 0111 the other side thereof.

he piston 12 is thus moved in one direction and actuates the cam block 10 relatively the s rin 7 and balance the force actuating the movement of the piston12,

' cam block 10 is a measure 0 30 tween the relatively movable shdably cooperiap ragm 5. Movement of the piston 24 also swings the link 18 about its plvotal connection with the link 17 so as to return the valve piston 20 to its neutral position and restore balance in the system. -The piston rod 11 and the flow of fluid in the conduit 1, and a pointer 35 is mounted on the piston rod 11 to cooperate with a scale -36 to measure the said flow of fluid. The cam surface of the block 10 is for producing a special and definite relation, for instance a quadratic relation, between the flow of fluid in the'conduit 1 and the movement of the piston 12, this relation being determined [by the form of the cam surface engagin the roller 8. or the pur ose of reducing friction beating parts of the system and thereby increase the accuracy and sensitivity thereof,

1 may pivotally connect one end 0 a link 26 to one arm of the bell crank lever 15 and the other end to one end of a lever 27dpivotally mounted at 28 intermediate its en on one end of a rod 280. The rod 280 is slidable in a fixed support and has compression s rings 30 inter osed between opposite ends t ereof and sai support. The end of said rod opposite the pivotal connection 28 is provided with a roller 29 maintained .in constant engagement' with a rotating cam 31, and counter weights 32 are applied to the end of the lever 27 op ositeits connection with the link 26. With t is construction the rotating cam 31 produces rapid longitudinal movements or vibrations in the rod 280 which are transmitted through the lever 27, link 26, lever 15 and links. 17 and 18 to the pistons 20 and 24 of the governor valve and the relay governor so as to reduce the friction between said pistonsfland their cylinders. Vibrations are also transmitted to the rod 6 of the diaazaro:

tures from balance of the forces exerted .a special and definite relation between the magnitude of the flow of fluid and .the movement of the movable member, and the motor 12, 13, block 10, roller 8 and spring 7000 erate with the diaphra m5 to maintain alance in the system. gbviously, the lever 15 and-links 17 and 18 are responsive to departhe diaphragm. While I have shown the system embodying mechanisms of certain detail constructions it will be understood that this is mainly for illustratin the princi les thereof, and that many mo ifications an chan es in the detail mechanism may be made wit out departing from the spirit or sco e of the invention. For instance, should it e desired to measure other values than fluid flow, suitable means sensitive to the desired-value could be rovided by those skilled in the art instea of the fiow.'resisting device and the diaphragmand casing-2 and 1. Therefore, I do not wish to be understood as restricting myself except as required by the following claims when construed in the light of the rior art.

Having thus describedthe inventlon, what- I claim is: I 1.. A measuring system of the character described in which the position of a movable member is varied as a measure in accordance with a variable value, said, system comprising movable means sensitive to variations in the magnitude of said value, including a plurality of relatively movable slidably cooperating parts, means including a plurality of relatively slidable parts and' actuated by auxiliary energy for exerting a mechanical force upon said first-mentioned means to balance the latter,governing means for controlling the application of said auxiliary energy to said second-mentioned means to vary said force including a plurality of relatively slidable parts, means responsive to departuresv from balance of said first twomentioned means due to variations insaid value including a plurality of slidably co-- operating parts for actuating said governing tween.

phra-glm to reduce friction between the same described, comprislng 2.1 measuring system of the character movable means sensitive to varlatlons 1n the magnitude of a value to be measured, means for mechanically cooperating with the first-mentioned means to balance the latter, a motor for actuating said second-mentioned means, a motor-operated relay governor for controlling the supply of motive medium to said motor, a governor for controlling the supply of motive medium to said relay governor, means responsive to departures from balance of said said first two-mentioned means due to variations in said value, an operative connection between said last-mentioned means and said second-mentioned governor for actuw ating the second-mentioned governor, and means actuated in accordance with said second-mentioned means for indicating said variations in said value.

3. A measurin system of the character described in whic member is varied as a measure in accordance with a variable value, said system comprising movable means sensitive to variations in the magnitude of sald value, means for exerting a mechanical force upon the firstmentxon'ed means to balance the latter, a motor, governing means for said motor, means res onsive to departures from balance of sai first two-mentioned means for actuating said governing means, a movable member actuated by said motor the position of which is the position of a movable a measure for said value, means for varyin the force'exerted by the second-mentione means upon said first-mentioned means for producing a special and definite relation between variations in said value and the movement of said. movable member, and means connecting the last-mentioned means with said motor for actuation thereb 4. A measuring system of t e character described in which the position of a movable member is varied as a measure in accordance with a variable value, Said system comprising movable means sensitive to variations in the magnitude of said value, a tension spring exerting a variable mechanical force upon the first-mentioned means to balance the latter, amotor, governing means for said motor, means res onsive to departures from balance of sai first two-mentioned means :for actuating said overnor, a movable member actuated by said motor the position of which is a measure of said value, a device operatively connected to and actuated by said motor andhavingla cam surface, and an operative connection etweeni said spring and-said device whereby said cam surface upon movement of said device-varies the force exerted by said spring upon the firstmentioned means to produce a special and definite relation between variations in said value and movement of said movable member.

' ERICH ROUCKA. 

